add swap status to the report

Signed-off-by: Egor Savkin <es@m-labs.hk>

src/channels.rs

@@ -508,6 +508,7 @@ impl Channels {
             temperature: state.get_temperature()
                 .map(|temperature| temperature.get::<degree_celsius>()),
             pid_engaged: state.pid_engaged,
+            current_swapped: state.polarity_swapped,
             i_set,
             dac_value,
             dac_feedback: self.adc_read(channel, PinsAdcReadTarget::DacVfb, 1),
@@ -606,6 +607,7 @@ pub struct Report {
     sens: Option<ElectricalResistance>,
     temperature: Option<f64>,
     pid_engaged: bool,
+    current_swapped: bool,
     i_set: ElectricCurrent,
     dac_value: ElectricPotential,
     dac_feedback: ElectricPotential,